共查询到11条相似文献,搜索用时 46 毫秒
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波长色散X荧光仪具有制样简单、良好的分辨率、无损快速定量分析、元素分析范围广等优点,在工业过程监控和产品质量控制中得到了广泛的应用。然而,波谱仪的制造技术和加工工艺等要求很高,我国使用的波谱仪绝大多数都是从国外进口的。针对建材行业质量控制特点,选择十种固定的元素,采用弯曲晶体制作固定分光道,利用400瓦低功率光管并采用上照式结构避免光管被污染及一体化X射线探测专利技术,完成国产化的固定道波谱仪。开发的上位机操作软件具有自动控制系统、多道采集系统,定量分析系统等多种X射线荧光光谱分析的特点,软件设计人性化,具有自动化程序高,操作简便,易于维护等特点,易于在工厂企业中得到推广。 相似文献
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同位素X荧光多元素分析仪在水泥工业中的应用前景 总被引:1,自引:0,他引:1
介绍目前水泥生产中物料在分分析的现状;对各类型仪器进行比较;介绍TXD型同位素X荧光多元素分析仪的性能,应用情况,分析其应用前景。 相似文献
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90年代以来,各种X射线荧光分析仪在我国水泥_1:业分析领域中逐步得到应用。X射线荧光分析仪以其可靠、稳定、快速的特点可以替代水泥工业中的化学全分析,为水泥工业生产控制及时提供可靠的数据,从而达到提高窑炉的运转率,保证水泥质量的目的。目前,国内一些大、中型水泥厂已经采用了进口分析仪器,一些中、小型水泥厂也已采用了国产分析仪器,分析仪器取代人工化学分析势在必行。一、小型多道X荧光波谱仪X射线荧光分析的基本原理:X射线照射待测样品,依样品中各种元素受激发后,发出各自的特征X射线,通过对特征X射线的分离和测… 相似文献
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1 前言 在水泥生产过程中对原材料、生料、熟料及水泥的化学组成进行分析监控是保证水泥质量的重要环节。我省大多数水泥厂采用常规的化学分析方法来完成这一环节,分析过程比较繁琐、费时,而且使用较多的化学试剂必然会产生一定的环境污染。随着科学技术的进步和生产的 相似文献
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水泥生料的偏振化能量色散X射线荧光光谱分析 总被引:1,自引:0,他引:1
引言能量色散X射线荧光光谱分析(EDXRF)有良好的适应性,能直接分析各种类型样品,如固体、粉末、液体试样,检测范围宽,无论常量元素或痕量元素(μg/g级)分析,特别是筛分分析的应用,能快速进行各类试样快速定性和半定量分析。近年来EDCRF又有了新的进展,主要是新的Si漂移探测器应用稳定二级Peltier冷却系统,免除了使用液氮冷却的麻烦,其Mnka线测量计数率在104脉冲计数时,能量分辨率为<17eV。Xepos仪器还应用了偏振X射线,大大降低了轻基体的散射背景,从而降低了元素的检出限,大大提高了试样的信噪比。R.Schramm使用了新的散射晶体HOPG (High Oriented Py-rolite Graphite)使轻元素分析得到了进一步改善。本文采用石蜡(HWC)为粘结剂压制样品,HOPG为次级靶分析了水泥生料中Na2O至Fe2O3等8个元素。 相似文献
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引言能量色散X射线荧光光谱分析(EDXRF)有良好的适应性,能直接分析各种类型样品,如固体、粉末、液体试样,检测范围宽,无论常量元素或痕量元素(μg/g级)分析,特别是筛分分析的应用,能快速进行各类试样快速定性和半定量分析。近年来EDXRF又有了新的进展,主要是新的Si 相似文献
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Health risk associated with dietary co-exposure to high levels of antimony and arsenic in the world's largest antimony mine area 总被引:3,自引:0,他引:3
Wu F Fu Z Liu B Mo C Chen B Corns W Liao H 《The Science of the total environment》2011,409(18):3344-3351
Like arsenic (As), antimony (Sb) is known to be a genotoxic element in vitro and in vivo. Sb is now recognized as a global contaminant and has aroused the global concerns recently. However, knowledge is scarce concerning the transfer of Sb from the environment to humans and the related hazards to human health. In this pilot study, the health risk and main pathway of long-term human exposure to Sb and As for residents around Chinese Xikuangshan (XKS) Sb mine, the world's largest Sb mine, were evaluated by dietary exposure and hair accumulations survey. The concentrations and species of Sb and As in food samples (n = 209) from three main categories and six subcategories, and in hair samples (n = 89) were determined. Residents in the vicinity of XKS had an estimated dietary intake of Sb (554 μg/day) which was 1.5 times higher than the tolerable daily intake (TDI) (Sb, 360 μg/day), whereas their dietary intake of inorganic As (107 μg/day) was slightly lower than the provisional tolerable weekly intake (PTWI) of 15 μg/kg BW/week (equal to 129 μg As/day). Hair Sb and As concentrations (Sb, 15.7 mg/kg, DW; As, 3.99 mg/kg, DW) in XKS residents are both above the normal/toxic level. Rice, vegetables (especially leafy vegetable), drinking water, and meat/poultry were the dominant dietary intake sources of Sb for the residents. In contrast, rice was the uniquely dominant dietary intake source of As. Antimonate (Sb(V)) was the dominant Sb species in vegetables, drinking water and residents' hairs. This study highlighted the difference of exposure characteristics between Sb and As. The preliminary results suggested that dietary exposures to Sb, rather than As, was the dominant health risk to local residents. Nevertheless, the adverse effects of As levels on the health of residents still can not be ignored since the elevated As concentrations in human hair have reached the critical level for health risks. In addition, this pilot study did not consider the possible Sb and As combined effects. 相似文献